Jump to content
SAU Community

Recommended Posts

Bit hard to explain, but having a surging problem when travelling at a constant speed (only happens over 100km/hr)

Happens at various speeds over 100.... eg 110, 115, 120. Only does it if i hold the accelerator at a constant speed. as soon as i de-accelerate or speed up it goes away. It also does not surge at a constant speed up hill (so shows it is not a problem under load)

I have changed the plugs, oil, oil filter, fuel filter, reset the ecu, changed the timing belt, had a code check... but no luck. I have also tried going back to 3rd gear in case it was a top gear problem... still no results.

I think its just a conicidence, but this surging problem started around the time I did an oil change and replaced the fuel filter...... could the new filter be a problem...?

Any help or suggestions would be great. I've had enough of this problem :)

Link to comment
https://www.sau.com.au/forums/topic/362368-strange-surging-problem/
Share on other sites

  • Replies 41
  • Created
  • Last Reply

Top Posters In This Topic

Forgot to mention that....

Already cleaned the throttle body, the AFM, and the air filter. I have a K & N Filter.... oiled

also replaced the foam seal around the snorkel (filter had lots of foam sitting on it from the old seal...

Running V-Power

hmmm, can't remember the revs it is sitting on at 110 (in 'D')

Edited by NYL83R

Probably waaaay off but I had a similar problem when I had my alarm installed.

Turns out the guy installing it hadn't clipped the the little plastic clippy thing into the positive terminal properly, it seemed in but it wasnt and i only had symptoms at 90klicks

Mine did this too on a recent long distance trip. I would wind her up, then go to overtake only to have this surging nonsense, and the speed only increasing marginally.

It was definitely pissing me off.

The last time I drove a car that did this, it turned out the cooling system was partially blocked = Not flowing enough coolant.

I will investigate!

When I changed the timing belt, I also replased the thermostat, flushed the system and replaced coolant

Only surges when doing a constant speed.... the car will accelerate fine with no loss of power

I'll check the terminals....I'll try anything at this stage :)

I do have an aftermarket BOV (blitz) but it had this surging problem before I put it on....

I only stuck it on for a bit of fun cause i was changing the plugs and had it sitting in the cupboard :)

The more i'm thinking about this, I am thinking it could be the fuel filter. Perhaps the new one I put on is a dud or not compatible... I saved the old one just in case, so I'll stick that on tomorrow and see what happens

  • 3 months later...

well.... digging back into this thread to have another go :)

I am still having the problem mentioned above. I've changed back to my old fuel filter thinking that was the problem. but no luck. I was suggested to try another AFM. I've already cleaned mine, but could be a dud? Anyone have a spare they would be willing to lend me? big ask, but i don't really want to buy a new AFM on a hunch.

Does it feel like the whole car is jerking slightly? Do you often hear the Attessa relay click in the engine bay? (located driver side strut tower).

Because thats what mine was doing. Turns out it was the 4WD system playing up. The 'accumulator' was buggered, it is a high pressurised cannister that holds Attessa pressure up to the system. There's a few threads about it on SAU, common to GTR's and GTS-4s also.

Just an idea...

Cheers

Paul.

  On 11/08/2011 at 6:48 AM, NYL83R said:

well.... digging back into this thread to have another go :)

I am still having the problem mentioned above. I've changed back to my old fuel filter thinking that was the problem. but no luck. I was suggested to try another AFM. I've already cleaned mine, but could be a dud? Anyone have a spare they would be willing to lend me? big ask, but i don't really want to buy a new AFM on a hunch.

I have had the same problem years ago when i was using a k&N air filter the oil distroys the afm and u never get it all out i went to a use a paper air filter and cleaned the afm was heaps better but still did not totaly fix it till i replaed the afm and now i only you paper air filters and no more problem

  On 11/08/2011 at 7:41 AM, frigjam said:

Does it feel like the whole car is jerking slightly? Do you often hear the Attessa relay click in the engine bay? (located driver side strut tower).

Because thats what mine was doing. Turns out it was the 4WD system playing up. The 'accumulator' was buggered, it is a high pressurised cannister that holds Attessa pressure up to the system. There's a few threads about it on SAU, common to GTR's and GTS-4s also.

Just an idea...

Cheers

Paul.

I agree and think it has something to do with the atessa system. How did u diognose ur accumulator was the problem?

If you have a S2 you can switch to 2wd as per the instructions or if your'e keen drop the front driveshaft to eliminate the attessa. Are all your tyres the same type and roughly the same state of wear? ( I think this unlikely as your cause but its easy to eliminate). I can send you an afm. Only trouble is I am assured it is good but not using one now as I have a G4 Link computer. Have you eliminated the O2 sensor? I think the easy way to do that is to just unplug it and go for a drive.

If you want to try my afm I just want the postage at this point and worry about the rest later (AU$60 to buy, postage probably about $20 - can let you know if interested).

thanks for the help guys. hmm I don't hear any clicking paul, would it be a noticable clicking when the problem starts? Yes the whole car jerks slightly. It could be my imagination, but since having this problem the car seems to have slightly less power overall? i'll investigate further. Could very well be the k&n oiled filter i have, after hearing what people are saying. I've had the filter in for a couple of years though before it started having this problem

I'll try unplugging the 02 sensor if you think it might help bob, otherwise I will take you up on that offer please. can you pm me bank details. cheers

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now



  • Similar Content

  • Latest Posts

    • You just need to remove the compressor housing, not the entire turbo. I would not be drilling and tapping anything with the housing still on anyways. 
    • So, I put my boat on a boat. First of all, I'm going to come out and say it. Why is Tasmania not considered a holy goal, an apex that all road-legal modified cars go to, to experience? This place is an absolute wonderland of titanic proportions. If people are already getting club runs for once in a lifetime 30 person cruises to Tassy then I've never seemed to see it. It is like someone replaced the entire place with an idyllic wonderland for cars, and all of the people living there with paid actors who are kind, humble, and friendly. Dear god. After doing a lap of almost all of the place I've found that it's a great way to find out all of the little things that the car isn't doing quite right and a great way to figure it all out. All in all, I drove for 4 hours a day for a week and nothing broke. I didn't even need to open the engine bay. This is by all means a great success, but it has left me with a list of things to potentially address. I also now have a 3D printed wheel fitment tool which annoyingly hasn't got any threads in it to actually assemble it. I might be able to tape it together to check the sizing I actually want to use, but it'll likely involving pulling the shocks out to properly measure travel at least at the front, and probably raise the car while I'm at it, at least in the rear. I scraped on quite a few things and I'm not sure how else to go about it. I was taking anything with a bump at what felt like 89 degree angles. And address those 10 other tasks. And wash the car. God damn it is dirty. And somehow, the weather was perfect the entire time - And because I was on the top of Mt Wellington it turns out it was very much about to freeze up there. I did something I typically never do and took some photos up there in what must have been -10 and the foggy felt like suspended ice, rather than mere fog. If you own a car in Australia, you owe it to yourself to do it.
    • Damn that was hilarious, and a bit embarrassing for skylines in general 馃槀 vintage car life ey. That R33 really stomped. Pretty entertaining stuff
    • Hi, I have a r32 gtr transmission. Does any of you guys have an idea how much power it will hold with the billet center plate and stock gearset? At what power level and use did yours brake with or without billet plate? Thanks, Oystein Lovik
    • Saw this replica police car based on a Mitsubishi Starion XX parked next to a 'police box' (it's literally a box) in Hirohata, Himeji City in Hyogo prefecture the other day. It's owned by Morii-san who is a local Mitsubishi Starion enthusiast. According to a local radio station blog post, he always wanted to make a police car himself based on ones he saw in his favourite Manga comics.  As it's illegal to modify a car to look like a police car and drive on the road, Morii-san tried many times to get permission from Aboshi police station headquarters nearby. They refused initially by after they got tired of that they granted him permission. However, the car can only be displayed on private property and obviously can't be registered as long as the police livery is present. The car was completed at a cost of 1.5 million yen (US$ 10,000) in addition to the car cost. A location was chosen outside Hirohata Police box where the car can easily been seen from the street. Morii-san has two other Starion road cars, both widebody GSR-VRs.
  • Create New...